21948602 has 16 divisors (see below), whose sum is σ = 35679840. Its totient is φ = 10066032.

The previous prime is 21948569. The next prime is 21948607. The reversal of 21948602 is 20684912.

It is a super-2 number, since 2×21948602² = 963482259508808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21948607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1649 + ... + 6827.

It is an arithmetic number, because the mean of its divisors is an integer number (2229990).

Almost surely, 2^21948602 is an apocalyptic number.

21948602 is a deficient number, since it is larger than the sum of its proper divisors (13731238).

21948602 is a wasteful number, since it uses less digits than its factorization.

21948602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5357.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 21948602 is about 4684.9335107342. The cubic root of 21948602 is about 279.9855519756.

The spelling of 21948602 in words is "twenty-one million, nine hundred forty-eight thousand, six hundred two".